A less restrictive variant of the WEC is the Average Weak Energy Condition (AWEC), which requires that when time-averaged along some arbitrary world-line through all time, the net energy must be greater than or equal to zero, so that any time period when the energy is negative must be compensated by a period of positive energy.

WEC Quick Quote: Jose Aldo could be the first MMA fighter to win three titles WEC 48 FightMetric statistics illustrate Jose Aldo's dominant win over Urijah Faber WEC 48: Was Mike Brown knocked out before even stepping into the cage against Manny Gamburyan?